After having some years in pastry. and then in textile screen printing I was able to get the experience to produce apparently safe edible silkscreen.

If someone is interested in retaking the thread, I can tell you specifically what information I obtained since then. Surely someone can help to understand global regulations for this issue.

Soon more photos and videos!

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No. 1-7

mitchb

Jul 27

Yes. You are right about that. I suppose you could address that by having two stencils which are the same except for having the bridges in different locations or one could just fill in the bridges of the first one.

Also I realized I was wrong about how the steel stencils are made - they are laser cut. So no photochemicals.

RICOSILKSCREEN

Jul 27

A stencil is the cut out figure. Then if you want to make letters like for example the O. We would have to adapt the designs leaving some bridges that keep the parts together!

The screen printing allows to achieve that those parts that in the stencil would be lost, are stuck in the silk.

For example this design would be impossible in stencil. When you cut the outline
you lose all the inner figures.

mitchb

Jul 27

These stencils are produced using photoresist etc. The resolution of the stencil I mentioned is around 0.001" (0.03mm) so I doubt if the ability of the stencil to render detail will be a concern. Also there are fixtures for these stencils designed to position them to a similar resolution.

The advantage for your application is that you get a piece of stainless steel and don't need to be concerned about the chemicals used to produce it (I think). It should be just like using a pot or pan.

RICOSILKSCREEN

Jul 27

Hi @mitchb
You can use any type of stencil. Even baking paper cut and positioned in contact with silkscreen silk. but you will never achieve the level of detail that can be achieved with photosensitive development.

mitchb

Jul 27

Maybe this doesn't help you, but an alternative might to to order stainless steel stencils used for making printed circuit boards. An example of a place that makes these is: https://www.oshstencils.com/#%20. You upload artwork and they send you the stencil.